Dust-collector



(No Model.)

H. PARRAR.

DUST COLLECTOR.

Patented Aug. 26, 1890 fi Inventor. By c- UNITED STATES PATENT OFFICE.

HENRY FARRAR, OF BUFFALO, NEV YORK.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 435,057, dated. August26,1890.

Application filed June 23, 1890. Serial No. 356,495. (No model.)

To to whom it may concern:

Be it known that I, HENRY FARRAR, a citizen of the United States,residing in Buffalo, in the county of Erie and State of New York, haveinvented certain new and useful Improvements in Dust-Collectors, ofwhich the following is a specification.

The object of my invention is to producea suitable machine forseparating thedustfrom air taken from middlings-purifiers,smut-machines, or for other analogous machines, all of which will befully and clearly hereinafter described and claimed, reference being hadto the accompanying drawings, in which Figure 1 is a side elevationlooking in the direction of the arrow 1), Fig. 3. Fig. 2 is a verticalcentral section on the line a b, Fig. 5. Fig. 3 is a top plan view. Fig.4 is an enlarged elevation of the ball used in the lower portion of thedust-collector case. Fig. 5 is a horizontal section on the line 0 cl,Fig. 1.

In said drawings, 1 represents the lower portion of the case, which ismade in the form of an inverted cone having a small opening 2 at thebottom. 3 represents the upper portion of the casing. It is madeslightly tapering from the bottom up, and the two parts 1 and 3 areunited together by the flanged portions at and 5, secured rigidlytogether by bolts 6. The upper portion 3 is provided with a top 7,having a central opening, to which is secured an inside imperforatecylindrical case 8, which projects down nearly to the inverted conicalportion 1, but not into it, and is secured at the bottom by a supportingcross-brace 9. If it were projected down into the case 1, it would causethe air to bear downward with too much force, and, causing too muchdisturbance in the lower case 1, would thereby interfere with the properworking of the machine. If its lower end were not placed down farenough, it would then permit too free an outlet through the tube 8, andin this way disturb the proper operation of the machine. Its properposition is therefore very near to the top of the case, butnot into it.(See Fig. 2.) In the center of the cross-brace 9 is astationary bearing10, in which is rigidly secured a stationary vertical shaft 11,

having its opposite or upper end secured to any convenient part of theceiling of the room,

in which itis placed, for instance, at the point 12. A short distanceabove the top of the portion 3 is a cone-shaped cover 13, adapted to beadjusted at any point on the shaft 11' by a set-screw-let, but is neverbrought down low enough to close or cover the outlet-opening below it.The object of this cover 13 is to provide a convenient means foradjusting the pressure of air within the casing, so as to regulate it inproportion to the force ofv the incoming dust and air through theinlet-spout 15. If the cover 13 be located too high up, the outlet ofair will be too great up through the outlet-tube 8, and would be liableto carry up and out some dust with it. If placed low enough down, it canbe made to force the air down instead of up. Consequently thisadjustable cover 13 is an important factor in the operation of themachine. It will be noticed that the cover 13 is made in the form of ahollow cone and is mountedon the shaft 11, so that its lower or insideportion is entirely free and unobstructed, and that no crossbraces ofany kind are used over the outletopening, so that it is also free andclear.

Near the bottom of the upper case 3 is a tangential inlet-spout 15.(Shown in Figs. 1, 3, and 5.) This spout is located horizontally and aslight distance above the cone-shaped case 1, so that the air in thelowercase receives only an indirect rotary motion by the action of theair and dust in the case 3 above it, as will be more clearly hereinaftershown. In the lower case is placed loosely a light ball 16, having asurrounding projecting rib 17, the object of which is to leave anopening around the ball between it and the sides of the case 1 for thefree dust at all times to pass down. This ball is continually in motionwhile the machine is in operation, the action of the air in the case 1being of sufficient force for that purpose, although it is not intendedto be as great as it is in the separating-chamber in the upper case 3,because it receives its motion only from the friction of the moving airin the case 3.

The operation of themachine is as follows: The air charged with dust,consisting of the finer and lighter particles of flour passing fromamiddlings-purilier (or other machine) beingforcedin the usual way,passesin straight lines through the inlet-spout 15 until it strikes thecurved inner sides of the case 3, when it is deflected and assumes arotary motion, the dust being thrown to the sides of the case 3, fromwhich it falls through the more slowlymoving air in the case 1 andthrough the opening 2. The ball 16, being made of thin sheet metal isvery light and easily kept in constant motion by the slight movements ofthe air at the point where it is located. Consequently the opening atthe point 2 is always free for the dust to pass through. The clear air,entirely separated from the dust, passes out through the tube 8, thedust being wholly separated therefrom as it enters the lower end .ofsaid tube.

The upper case 3 can be in the form of a straight cylindrical case, ifdesired, having the inner walls vertical, or substantially so;

but I prefer the tapering form shown, as the interior walls inclineinward, so that dust is not so liable to lodge or adhere to them. Thisform is therefore preferable.

I claim as my invention- I 1. In a dust-collector, an upperseparatingcase forming the upper portion of the collector, a horizontalinlet-spout connected tangentially therewith located slightly above thelower edge of the same, a central vertical discharge-tube having itsoutlet at the top of the upper case to which it is connected and itslower open end slightly above the bottom edge of the upper case, and alower separatingcase tapering from the top or large end downward to asmall outlet-opening, its upper end being connected with and entirelyopen to the lower end of the upper chamber, and a Vertical central shaftprovided with a verticallyadjustable cone-shaped cover located on saidshaft above the upper case and outlet-opening, substantially asdescribed.

2. In a dust-collector, the combination, with alower tapering dustcollecting and discharge case having a small outlet-opening at thebottom, of a light ball provided with a rib and located within theoutlet-opening, a separating-case located above the lower case connectedtherewith and covering the same, a tangential inlet-spout in theseparating-case located above the open top of the lower-collecting-case,whereby the air and dust are conducted into it and made to rotatetherein,

and an air-outlet tube having its lower end 7 f above the top of thelowercase and its outlet end at the top of the upper case, substantiallyas described.

HENRY FARRAR.

Witnesses:

J AMES SANGSTER, (JORA J. BLAKELEY.

